How Rum Is Made

Before we go island-hopping, a quick primer on rum production — because understanding the basics makes the island-by-island differences a lot more interesting.

All rum starts with some byproduct of sugarcane. Most Caribbean rums are made from molasses — the dark syrup that remains after sugar is extracted from cane juice. A few islands, most notably Martinique and Guadeloupe, make rum directly from fresh sugarcane juice. This is called rhum agricole, and it produces a distinctly different flavor: grassy, vegetal, and intensely aromatic. Here in the Virgin Islands, we make rum from unrefined Demerara sugar — minimally processed, with a wonderfully deep molasses and toffee character all its own.

Once you have your base — whether molasses, Demerara sugar, or cane juice — you add water and yeast to ferment it, converting sugars into alcohol. Then you distill that fermented liquid in either a pot still (which produces a heavier, more flavorful spirit, capturing more aromatic compounds) or a column still (more efficient, producing a lighter, cleaner spirit). Many distilleries use both. After distillation, rum is typically aged in oak barrels — and in the warm Caribbean climate, that aging happens faster than it would in Scotland or Kentucky, drawing color and complexity from the wood at an accelerated pace.^[1]

How Rum Conquered the Caribbean

Rum’s origins are inseparable from one of history’s most consequential agricultural industries: sugar. When European explorers brought sugarcane to the Caribbean in the 1400s, they discovered that the climate and soil were perfect for growing it. Christopher Columbus brought the first cane stalks on his second voyage in 1493, and the crop spread rapidly across the islands.^[2]

Monied interests followed. Large plantations sprang up. Sugar was exported all over the world. And during the refining process, a thick, dark syrup was left behind. At first, molasses was viewed as a waste product and discarded. But enterprising farmers discovered that the residual sugars in it could be fermented and distilled into strong alcohol — affectionately known as killdevil, but later known as rum.

Each island that took up rum production did so with its own techniques and recipes. Needless to say, in the early decades, rum wasn’t considered a craft product. It was made for one purpose only: to get you drunk for cheap. But over time, distilleries honed their product and began to take their rum production seriously.

With that foundation in place, let’s talk about the islands.

Barbados: The Birthplace of Rum

If rum has a birthplace, it’s Barbados. Evidence of molasses distillation on the island dates to the 1600s, making Barbados arguably the first rum-producing nation in the world — a claim it wears with considerable pride.^[3]

The island’s rum tradition is also home to the world’s oldest commercially operating rum distillery: Mount Gay, whose founding deed dates to 1703 — more than three centuries ago.^[4]

Barbados tends to produce rums that are smooth, rounded, and approachable without sacrificing complexity. This comes from the island’s tradition of blending both pot still and column still distillates — getting the best of both worlds. The island’s natural coral limestone also filters the groundwater used in production, giving Bajan rum an unusually clean base.

Jamaica: Bring on the Funk

Ask a serious rum enthusiast about Jamaica, and one word will come up almost immediately: funk. Jamaican rum has a bold, distinctive character unlike anything else in the Caribbean. That funk — a complex, almost tropical-fruit-and-overripe-banana quality — comes from a compound called esters, which are produced during fermentation.

Jamaican distillers cultivate high ester levels through long, slow fermentation and the use of dunder (the leftover residue from previous distillations) and muck pits as fermentation starters — essentially composting pits filled with dunder and other byproducts of the rum-making process. It sounds unruly; the results are extraordinary.^[1]

Most Jamaican rum is made in pot stills, which preserves all those wild aromatic compounds. Jamaican rums range from intensely funky overproof expressions beloved by cocktail bartenders, to more elegant aged expressions that bring the funk into balance with wood and vanilla.

Martinique: The AOC World of Rhum Agricole

Martinique is where Caribbean rum gets its most “French” chapter. The island produces rhum agricole under a strictly protected Appellation d’Origine Contrôlée (AOC) — a designation more associated with Champagne and Cognac than the rum world. Martinique’s AOC, granted in 1996, is the only one of its kind for rum anywhere in the world.^[5]

What sets Martinique apart is what goes into the still: fresh sugarcane juice, not molasses. While most Caribbean rum is made from the byproduct of sugar refining, Martinican rhum agricole skips the sugar factory entirely and presses the cane juice directly. This produces a completely different flavor profile — vibrant, grassy, floral, with a distinctive vegetal freshness that can seem almost herbal.

Martinican rhum comes in three main expressions: blanc (unaged, intensely aromatic), élevé sous bois (lightly rested in oak), and vieux (aged minimum three years, with complexity similar to a fine Cognac).

Cuba: The Ron Tradition and the Light Style

Cuba’s relationship with rum is as legendary as its cigars, its cars, and its music. Cuban rum — or ron — has its own distinct philosophy: lightness, refinement, and the art of blending.

Cuban rum must be made from molasses sourced exclusively from Cuban-grown sugarcane, and it’s distilled in column stills to a high ABV — which strips out much of the raw, heavy flavors you find in pot still rums. The result is a lighter, drier base spirit that then spends significant time in oak, developing complex notes of coffee, tobacco, nuts, and chocolate. The oversight of production falls to a small, elite group of Maestros Roneros — rum masters who dedicate their careers to upholding Cuba’s rum heritage.^[1]

Puerto Rico: The Island of Light Rum

Puerto Rico occupies a unique position in the rum world: it’s both home to some of the biggest-selling rum brands on the planet and a place with a genuine, centuries-old distilling tradition. Puerto Rican rum is governed by strict local regulations that require all rum to be aged for at least one year in oak barrels — a baseline that gives even the entry-level expressions a level of quality many competitors don’t match.^[6]

The Puerto Rican style, much like Cuba’s, leans toward lightness. Multiple distillations in column stills strip the spirit of heavy congeners, producing clean, smooth, versatile rums that mix beautifully. They’re the workhorses of the cocktail world — the reason your daiquiri, your mojito, and your rum and Coke taste the way they do.

Trinidad & Tobago: Angostura

Trinidad and Tobago doesn’t always get the same attention as Jamaica or Martinique in rum conversations, but it absolutely deserves a seat at the table. Trinidadian rum tends toward elegance — lighter than Jamaica, more nuanced than Puerto Rico, with a clean, refined character and a remarkable capacity for aging gracefully.

The island is home to Angostura, one of the most important rum producers in the world — a company that also happens to make the aromatic bitters used in virtually every cocktail bar on the planet. That dual legacy says a lot about Trinidad’s commitment to the spirits craft.

St. Thomas, Virgin Islands: The Demerara Legacy

St. Thomas has adopted a legacy that is both rooted in Guyana — a South American rum powerhouse — and the island’s own rum traditions. We start with a beautiful Guyanese Demerara sugar, which is unique and unlike other sugars. It is minimally processed and has a wonderfully deep molasses and toffee flavor.

Demerara sugar creates rums that are dark, complex, and full of molasses sweetness. What is probably the signature piece to a St. Thomas rum, however, is the aging process. We only use virgin barrels to age the rum. The vast majority of distilleries in the world opt for a used barrel — one that previously held bourbon, port, or Cognac. Using a virgin barrel adds a smokiness and oakiness similar to a high-end bourbon.

There is only one rum distillery on St. Thomas still using this method.

Dominican Republic: Underrated

The Dominican Republic produces some of the most commercially successful and internationally awarded rums in the Caribbean, yet it still somehow flies under the radar among rum aficionados.

Dominican rum — or ron dominicano — sits comfortably in the Hispanic tradition: molasses-based, column-distilled, and aged with an emphasis on smoothness and refinement. The country’s climate and the quality of its locally grown sugarcane give its rums a distinctive sweetness and warmth.

How to Taste Your Way Through the Caribbean

Now that you have the map, here’s how to actually use it. The best way to understand Caribbean rum’s diversity is to taste it comparatively. Pick up one bottle from two or three different islands and pour them side by side. The differences will become immediately, sometimes startlingly, apparent.

A Tasting Primer

Here’s the hard part: trust your own palate. The “best” rum is the one you enjoy most. Some people love Jamaica’s untamed funk. Others prefer the silky refinement of a well-aged Cuban. Others can’t get enough of Martinique’s grassy freshness. All of these preferences are valid. The Caribbean rum world is big enough for all of them.

The Map Is Just the Beginning

What strikes us most, living and working in the heart of the Caribbean, is how much personality each of these islands packs into a bottle. You can taste centuries of history in a glass of Hampden Estate pot still rum. You can feel the volcanic soil of Martinique in a sip of rhum agricole blanc. You can sense the old Danish trading routes in a pour of 3 Queens.

So the next time you’re standing in front of that overwhelming rum shelf — good. That feeling means you’re looking at a world worth exploring. Pick a bottle, pour a glass, and let the islands take you somewhere.